CN215058424U

CN215058424U - Fan impeller for low noise fan coil

Info

Publication number: CN215058424U
Application number: CN202120475792.3U
Authority: CN
Inventors: 刘桂兴
Original assignee: Jiangsu Jixiang Air Conditioning Equipment Co ltd
Current assignee: Jiangsu Jixiang Air Conditioning Equipment Co ltd
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2021-12-07
Anticipated expiration: 2031-03-05

Abstract

The utility model discloses a fan impeller for a low-noise fan coil, which comprises a left end ring and a right end ring, wherein a plurality of blades are uniformly distributed on the inner side of the left end ring, and the other ends of the plurality of blades are connected with the right end ring; the blades are arranged into arc surfaces, and a plurality of notches are uniformly distributed on the arc surfaces on the front sides of the blades along the axial direction. The utility model has the advantages of simple and reasonable structure, make the fan reduce the size, intensity and the cycle of vortex, reduced the noise of fan by a wide margin, improved the efficiency of fan, reduced the motor consumption.

Description

Fan impeller for low noise fan coil

Technical Field

The utility model relates to the field of refrigeration technology, especially, relate to a fan wheel for low noise fan coil.

Background

The fan coil is a common terminal device of a central air-conditioning system, and along with the improvement of the life quality of people recently, the requirements on indoor environment have new requirements on sound environment besides temperature and humidity requirements, the fan coil is used as an indoor unit of the central air-conditioning system, the moving parts of the fan coil are only a fan and a motor, the main noise of the fan coil is wind noise of the fan, and the noise of the fan mainly comes from several aspects:

1. when the fan is manufactured, the dynamic balance of the fan is unqualified due to process problems or errors of manual machinery and the like, and abnormal noise is caused, which is of course abnormal noise.

2. After the air in the fan is reflected by the volute wall, a secondary vortex is formed in the volute, so that noise is generated.

3. The noise caused by the interaction between the high-speed airflow and the fins of the surface cooler.

4. The fan coil outlet airflow suddenly diffuses and generates noise.

5. The airflow in the fan generates the pneumatic noise of vortex shedding when the blades of the fan are separated.

Therefore, how to reduce the noise of the fan has become a research focus in the industry.

Disclosure of Invention

The utility model aims at solving the technical problem and providing a fan impeller for low noise fan coil.

In order to realize the technical purpose, reach foretell technical requirement, the utility model discloses the technical scheme who adopts is:

a fan wheel for low noise fan coil, including left end link, right-hand member, its characterized in that: the inner side of the left end ring is uniformly provided with a plurality of blades, and the other ends of the plurality of blades are connected with the right end ring; the blades are arranged into arc surfaces, and a plurality of notches are uniformly distributed on the arc surfaces on the front sides of the blades along the axial direction.

Preferably: the left end ring and the right end ring have the same diameter.

Preferably: the notch is arranged to be triangular, semicircular, trapezoidal, U-shaped or special-shaped.

Preferably: the distance between the center of each notch and the end face of each blade is set to be 5-7 mm, and the center distance between the two notches is set to be 10-15 mm.

Compared with the traditional structure, the beneficial effects of the utility model are that:

1. the fan reduces the size, strength and period of vortex, reduces noise caused by interaction between airflow and fins of the surface cooler, weakens the strength of secondary vortex formed in the volute after air is reflected by the volute wall, and reduces noise.

2. And the noise generated by sudden diffusion of the airflow at the outlet of the fan coil is reduced.

3. The aerodynamic noise that the vortex drops is reduced when the air current in the fan separates on the fan blade.

4. Greatly reducing the vibration noise of the fan.

5. The efficiency of the fan is greatly improved, the efficiency of the air outlet air volume is improved by 7% -12% compared with that of the traditional cross-flow fan under the air volume test condition of 480 m/h of inlet air volume, the noise is reduced by 1-2.5 decibels, and the power consumption of the motor is reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the blade of the present invention;

in the figure: 1. the left end ring, 2, blades, 21, notches and 3, the right end ring.

Detailed Description

The present invention will be further explained below.

Referring to the attached drawings, the fan impeller for the low-noise fan coil comprises a left end ring 1 and a right end ring 3, and is characterized in that: the inner side of the left end ring 1 is uniformly provided with a plurality of blades 2, and the other ends of the plurality of blades 2 are connected with a right end ring 3; the blade 2 is arranged to be an arc surface, and a plurality of notches 21 are uniformly distributed on the arc surface on the front side of the blade 2 along the axial direction.

In the preferred embodiment, the diameters of the left end ring 1 and the right end ring 3 are equal.

In the preferred embodiment, the notch 21 is configured as a triangle, or a semicircle, or a trapezoid, or a U-shape, or a special shape.

In the preferred embodiment, the distance between the center of each notch 21 and the end face of each blade 2 is set to be 5-7 mm, and the center distance between the two notches 21 is set to be 10-15 mm.

According to the working principle, the fan with the plurality of gaps uniformly distributed on the blade utilizes the gaps on the blade of the cross-flow fan, so that the size, the strength and the period of a vortex are reduced, the area of the blade for cutting air is reduced, the resistance of the air is reduced during rotation, and the noise of the cutting air is also reduced; the vibration phase and the period of the blades can be disturbed, and the vibration noise of the fan is greatly reduced.

The above embodiments of the present invention are only examples for clearly illustrating the present invention, but not for limiting the scope of the present invention, and all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.

Claims

1. A fan wheel for low noise fan coil, including left end ring (1), right-hand member (3), its characterized in that: a plurality of blades (2) are uniformly distributed on the inner side of the left end ring (1), and the other ends of the blades (2) are connected with the right end ring (3); the blade (2) is arranged to be an arc surface, and a plurality of notches (21) are uniformly distributed on the arc surface of the front side of the blade (2) along the axial direction.

2. A fan wheel for a low noise fan coil as set forth in claim 1, wherein: the diameters of the left end ring (1) and the right end ring (3) are equal.

3. A fan wheel for a low noise fan coil as set forth in claim 1, wherein: the notch (21) is arranged to be triangular, semicircular, trapezoidal, U-shaped or special-shaped.

4. A fan wheel for a low noise fan coil as claimed in claim 1 or 3, wherein: the distance between the center of the notch (21) and the end face of the blade (2) is set to be 5-7 mm, and the center distance between the two notches (21) is set to be 10-15 mm.